B2274

2GR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2274: ACC Monitor Malfunction

DTC B2274 - ACC Monitor Malfunction

DESCRIPTION

This DTC is output when a malfunction is occurring in the ACC output circuit, which is from the ACC relay actuation circuit inside the power source control ECU to the ACC relay.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRE HARNESS (COWL SIDE J/B RH - POWER SOURCE CONTROL ECU AND BODY GROUND)





(a) Disconnect the DA and DD J/B connectors.
(b) Disconnect the K73 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
2. CHECK COWL SIDE J/B RH (ACC RELAY)





(a) Disconnect the DD and DM J/B connectors.
(b) Measure the resistance of the J/B connectors.
Standard resistance:






NG -- REPLACE COWL SIDE J/B RH
OK -- REPLACE POWER SOURCE CONTROL ECU